Louis schroter



(No Model.) L. SOHROTER.

BOILER CLEANER. I No. 366,796. Patented July 19, 1887.

By. Z

UNITED STATES PATENT OFFI E.

LOUIS SOHRGTER, OF GUBEN, PRUSSIA, GERMANY.

BOILER-CLEANER.

SPECIFICATION forming part of Letters Patent No. 366,796, dated July 19, 1887.

Application filed September 17, 1556. Serial No. 213,809. (No model.) Patented in Belgium January 31, 1885, No. 67,710, and May 8, 1885, No. (58,813; in England May 4, 1855, No. 5,472, and in Germany September 30, 1885, No. 36,175.

' To all whom it may concern.-

Be it known that I, LOUIS SOHRGTER, a subject of the King of Prussia, German Emperor, residing at the city of Guben, in the Kingdom of Prussia, German Empire, haveinvented certain new and useful Improvements in Boiler- Cleaners, (for which I have received Letters Patentin Germany, No. 36,175, dated September 30, 1885; in England, dated May 4, 1885, No. 5,472, and in Belgium, No. 67,710, dated January 31, 1885, and No. 68,813, dated May 8, 1885;) and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

Hitherto it has been customary to purify the feedwater of steam-boilers by passing the same intolarge clearing or filtering vessels, in which, partly with the aid of chemicals or by the application of heat, the solid parts are caused to subside; or chemicals are placed in the boiler, and by frequent blowing oli, or by provision of intercepting chambers, it is attempted to keep the impurities away from the parts of the boiler which are exposed to the fire. Both of these methods are faulty. The first is obviously very costly, at the same time that a portion ofthe impurities is not infrequently carried over into the boiler, and the second method gives unfavorable results, as the sediment cannot well be prevented from burning onto the interior surface of the boiler.

Now the object of my invention consists in continuously conducting the waterwhich has been pumped into the boilerin an impure state, the lime components and impurities of which concentrate near the bottom by reason of the boiling and evaporation-from the point where such concentration takes place, to a clarifying-vessel, allowing it to stand for settlement, and then conducting it back again to the boiler, the sediment remaining behind in the clarifying-vessel being discharged there from at suitable intervals.

The apparatus of this invention is shown in the accompanying drawings, Figure 1 being a sectional elevation, and Fig. 2 a plan, of the same.

A is a central pipe, in which water drawn from the boiler-generally from the lowest point in the samcis caused to ascend in the impure state. it becomes distributed within the apparatus, and all heavy impurities fall to the bottom. After the water has been purified in this way, it flows back into the boiler through the orifice B. Check-valves are mounted on the pipes, which connect with A and B. for the purpose of preventing water entering at B and passing out at A. i

D isa lever connected to a float, E, which is in part counterbalanced by a weight, F. The whole apparatus is in communication by means of a steam-pipe connected thereto at G with the steam-space of the boiler, and is constantly subject to boiler-pressure. \Vhen the steamvalve is shut, condensation takes place within the apparatus, causing a partial vacuum, by which the water is caused to rise in the apparatus until the float E is so far acted upon that the counter-weight F, through its connectinglevers, raises the end of the lever D, and thus operates the opening of the valve 0, through which steam from the boiler at once passes into the apparatus and drives the already-clarified boiler-water present in apparatus out of the same in such quantity as to leave the float E nearly free of boiler-water, so that its weight will overcome that of the counterweight F, pull down the end of the lever D, and allow the valve 0 to shut.

G is an orifice to which is fixed a cock for discharging the mud or sediment, and also for emptying the apparatus.

The inlet and outlet of the water into and from the apparatus may also take place through a single pipe, in which case either the central pipe, A, or the outlet B would be dispensed with, and instead of the two check-valves a duplex check-valve would be provided. The apparatus is worked by the surface condensation of the steam and by the pressure of the same, the heavy impurities being precipitated to the bottom, the clarified water supplied back to the boiler, and more impure water received for clarification. In this way the whole of the contents of a steam-boiler may in the course of a day be passed several times through the apparatus and purified,

XVhat I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of the clarifying-vessel with the steam-valve C, float E, lever D, and counterweight F, for the purpose'speeified.

2. The combination of the clarifyin vessel steam-valve O, lever D, float E, and eounter LOUIS SOIIROTER' Witnesses:

13. R01, EMIL OAPITAINE.

specification in the presence of two subscribing witnesses.

5 weight F with the pipeconneetions A B and 1 the check-valves, for the purpose specified.

In testimony whereof I have signed this 

